This is a short guide on how to Install PHP 8.1 on CentOS 7 Linux system.

If you're looking for PHP 7.4 visit here.

What’s New in PHP 8.1?

• Enums have been integrated
• Readonly properties (Class properties can be marked as read-only and thus can only be written once.
• Never keyword (A new return type hint named Never was added in PHP 8.1)
• DNS over HTTPS (DoH) support.
• Support AVIF Image format.
• Added support for Fibers (Low-level mechanism for parallel management).
• The PHP Curl extension now supports HTTP(S) requests with File upload.
• Support for new fdatasync() and fsync() functions.
• PHP 8.1 adds array_is_list as a built-in function.
• Speed ​​efficiency improved from 5% to 8% compared to the old version
• Unpack the array using string keys.

Step 1: Add EPEL and REMI Repository

yum -y install https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
yum -y install https://rpms.remirepo.net/enterprise/remi-release-7.rpm

Step 2: Install PHP 8.1 on CentOS 7

We can now enable PHP 7.4 Remi repository and install PHP 7.4 on CentOS 7.

yum -y install yum-utils
yum-config-manager --enable remi-php81

Install PHP 7.4 on CentOS 7.

yum update
yum install php php-cli

Accept installation prompt by typing y and hit enter

Use the next command to install additional packages:

yum install php-xxx

// Example

yum install php  php-cli php-fpm php-mysqlnd php-zip php-devel php-gd php-mcrypt php-mbstring php-curl php-xml php-pear php-bcmath php-json

The current PHP version should be 8.1.

php -v

Now you have PHP 8.1